JPS5942011Y2 - Gas-liquid separator in medical vacuum equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a gas-liquid separator in a medical vacuum device for efficiently and continuously treating patients in dentistry, otorhinolaryngology, etc.

Conventionally, this type of medical vacuum device uses the suction action of an ejector to suck therapeutic waste fluid accumulated in the patient's oral cavity from a suction chimp connected to the ejector into the atmosphere and equipment, and then connects it to the pipes. In this system, the suction air was introduced into the ejector through the ejector and discharged into the storage tank, and whenever the waste liquid became full in the storage tank, the operation of the ejector was stopped and the inside of the storage tank was discharged. There was a drawback that treatment work had to be started again after emptying, and patient treatment work had to be interrupted during that time.

In addition, in order to avoid the trouble of emptying the waste liquid in the storage tank each time, the end of the piping is connected directly to the sewer pipe without draining the gas-liquid mixture of waste liquid sucked from the suction tip and the atmosphere into the storage tank. In this case, the high-pressure gas-liquid mixed fluid sucked from the suction tip is directly discharged into the sewer, which has the disadvantage of giving off a bad odor to other sewer pipes communicating with the sewer pipe.

In order to eliminate these drawbacks, multiple deliquid tanks are installed.
The multi-hole valve body, which is slidably fitted into the multi-hole valve body housing installed in one of these de-liquid tanks, moves up and down depending on the flow rate change of the waste liquid in the de-liquid tank. There is a device in which the gas-liquid mixed fluid flow path, the exhaust flow path, and the atmospheric suction flow path of each of the liquid tanks can be alternately switched, so that deliquification and drainage can be performed continuously and alternately.

However, although this method has the advantage of being able to perform dehydration and drainage processes continuously and alternately, it is difficult to use in the clinic because dehydration and drainage processes are performed in multiple dehydration tanks. Installing a dehydration tank depending on the amount of liquid requires extra space, which has the disadvantage of narrowing the space between treatment rooms.

In addition, the use of a multi-hole valve body makes manufacturing complicated and requires a large number of piping, which is troublesome.

Since a float system is adopted using a multi-hole valve body, the float will not operate unless a certain amount of waste liquid has accumulated in the deliquid tank, and the waste liquid in the deliquid tank cannot be discharged at a desired position. There were some disadvantages such as.

This invention was made to eliminate the above-mentioned drawbacks, and its purpose was to reduce the overall size by making it possible to perform dehydration and drainage continuously and alternately in one dehydrating tank. In order to avoid narrowing the treatment space by reducing the installation area, we developed a medical vacuum with a main structure that allows the waste liquid in the dehydration tank to be discharged at a desired location by simply setting an arbitrary time. An object of the present invention is to generally provide a gas-liquid separator in an apparatus.

An embodiment of this invention will be described below with reference to the drawings.

Reference numeral 1 denotes a corrosion-resistant liquid removal tank made of vinyl chloride or the like, and a lid 3 is placed on the liquid removal tank via a banking 2 provided on the upper end surface, and the iron lid is tightened with a tightening tool 4 to seal the iron tank. .

Reference numeral 5 denotes a partition wall formed at a predetermined height from the lower part of the liquid removal tank 1, that is, the bottom 6, and the peripheral edge of the partition wall is welded to the inner wall of the liquid removal tank 1.

The upper side of the deliquid tank 1 partitioned by the partition wall 5 is used as a gas-liquid separation chamber 7, and the lower side thereof is used as a liquid storage chamber 8.

9.10 is an outlet formed in the partition wall 5 and the bottom part 6, respectively;
Reference numerals 11 and 12 indicate valve bodies installed at the discharge ports 9 and 10, respectively.

The valve bodies 11 and 12 are valve stems 11a that are loosely inserted into the respective discharge ports 9 and 10.

12a and a discharge port 9 fixed to each upper and lower end of the valve stem.
, 10 with a larger diameter than desks 11b, 11b' and 12b.
, 12b'.

At the periphery of each discharge port 9, 10, one or more (in this example, two) through holes 11c, 12c are bored as shown in the first and second figures.

Reference numeral 13 denotes a connecting pipe for connecting the gas-liquid separation chamber 7 and the liquid storage chamber 8 from the outside of the liquid removal tank 1, and both ends thereof are connected to the upper part of each chamber.

An electromagnetic three-way switching valve 14 is provided in the middle of this connecting pipe 13.

When the three-way switching valve 14 is in the ON state, the gas-liquid separation chamber 7 and the liquid storage chamber 8 are connected via the connecting pipe 13, and the air pressure in both chambers is uniformly reduced.

Further, when the three-way switching valve 14 is in the OFF state, the connection between the gas-liquid separation chamber 7 and the liquid storage chamber 8 is cut off, and the three-way switching valve 14
Atmospheric air flows into the liquid storage chamber 8 through the exhaust port 14a.

15 is a timer electrically connected to the three-way switching valve 14;
Turn on the three-way switching valve 14.

The OFF operation is performed alternately and continuously according to the time setting of the timer 15.

Reference numeral 16 denotes a suction tip that aspirates treatment waste liquid accumulated in the patient's oral cavity etc. together with the atmosphere as a gas-liquid mixed fluid.A suction pipe 17 is connected to the end of the suction chip 16, and the other end of the suction pipe 17 is connected to the end of the suction chip 16. It is connected via a filter 19 to an inlet 18 provided in the lid 3 at the top of the deliquid tank 1 .

Reference numeral 20 denotes an ejector that sends compressed air from the inlet 21 in the direction of the arrow as shown in the figure, and makes the interior of the deliquor tank 1 a vacuum by the suction action.

Note that a vacuum pump (not shown) may be used instead of the ejector 20.
The interior of the liquid removal tank 1 may be evacuated by the suction action.

Reference numeral 22 denotes an exhaust pipe connected to the ejector 20, and the other end is connected to an exhaust port 23 formed in the lid 3.

Reference numeral 24 denotes a safety device installed in the deliquor tank 1, and a reed switch 26 in a hollow body 25 fixed vertically at the center of the lower surface of the lid 3.
and an annular float 28 made of synthetic resin that loosely fits into the hollow body 25 and is locked to the stopper 27.

A magnet 29 is formed on the inner peripheral surface of the annular float 28 .

However, due to some kind of malfunction, this safety device 24 may
This is to prevent a large amount of waste liquid from accumulating inside the drain tank 1, and to prevent the waste liquid in the liquid removal tank 1 from flowing out from the exhaust port 23 and into the ejector 20 or the pump system. , is designed to operate only in emergency situations.

The safety device 24 is activated when the annular float 28 begins to float from the stopper 27 position as the waste liquid in the tank 1 rises and gradually rises until it reaches the reed switch 26 position, and the reed switch is turned on. The operation of other drive sources (not shown) electrically connected to this will stop.

In the figure, 30 indicates a drain pipe.

2-3 show another embodiment in which the gas-liquid mixed fluid sucked from the suction tip 16 can be more smoothly separated into gas and liquid in the gas-liquid separation chamber 7. FIG.

That is, the liquid removal tank 1 is formed into a cylindrical shape, and the suction tip 16 is formed into a cylindrical shape.
The inlet 18 through which the gas-liquid mixed fluid sucked from the chamber flows in through the suction pipe 17 is installed so as to be located in the tangential direction of the inner peripheral surface of the gas-liquid separation chamber 7 as shown in the third figure.

31 indicates a separation cone fixed to the back surface of the lid 3.

In the annular space 32 between the separation cone 31 and the inner surface of the gas-liquid separation chamber 7, the gas-liquid mixed fluid is injected at high speed from the inlet 18 and rotates along the inner peripheral wall, receiving the action of centrifugal force and having a specific gravity. Gas-liquid separation is performed by the difference.

In this embodiment, the three-way switching valve 14, the timer 15, and the safety device 24 are all operated and stopped by electrical control, but the invention is not necessarily limited to this, and these 14. Of course, both of 15 and 24 may be operated and stopped by a fluid control method using an air signal.

Since this device has the above structure, when using it,
First, before turning on the power, the three-way switching valve 14 is alternately and continuously turned on and off, taking into account the capacities of the gas-liquid separation chamber 7 and the liquid storage chamber 8, the inflow speed and amount of the gas-liquid mixed fluid, etc. To do this, set the timer 19.

Next, when the power is turned on, the ejector 20 or the vacuum pump is activated to bring the gas-liquid separation chamber 7 into a vacuum or reduced pressure state.

When the gas-liquid separation chamber I is in a reduced pressure state, the treatment waste liquid accumulated in the patient's oral cavity and the surrounding air are mixed into a gas-liquid mixed fluid from the suction tip 16 connected via the inlet 18 and suction piping 17. The liquid then flows into the gas-liquid separation chamber 1 of the deliquid tank 1.

Now, when the three-way switching valve 14 is in the ON state, the gas-liquid separation chamber I and the liquid storage chamber 8 are in communication via the connecting pipe 13, and both chambers 7
．． 8. Both chambers are in a reduced pressure or vacuum state, and there is no difference in gas pressure between the two chambers.

As a result, the valve body 11 provided on the partition wall 5 descends under its own weight, and the upper desk 11b comes into contact with the upper surface of the partition wall 5, and the gas passes through the through hole 11c at the periphery of the discharge port 90 and accumulates in the gas-liquid separation chamber T. The waste liquid will be drained away and stored in the liquid storage chamber 8.

Further, since the drain side of the valve body 12 provided at the bottom 6 of the liquid storage chamber 8 is at atmospheric pressure and the inside of the liquid storage chamber 8 is in a reduced pressure state, the valve body 12 is closed due to the pressure difference, and the waste liquid is drained into the drain. is not discharged.

Next, when the time set in the ON state by the timer 15 has elapsed, the three-way switching valve 14 is switched from the ON state to the OFF state.

In this OFF state, the flow of air through the connecting pipe 13 connecting the gas-liquid separation chamber 7 and the liquid storage chamber 8 is blocked, and the atmosphere flows into the liquid storage chamber 8 from the exhaust port 14a of the three-way switching valve 14. That will happen.

As a result, the valve body 11 of the partition wall 5 is closed due to the pressure difference between the gases, while the valve body 12 of the bottom part 6 is opened due to its own weight, and the waste liquid stored in the liquid storage chamber 8 is discharged to the outside from the discharge port 10. be done.

After that, the timer 15 automatically repeats the three-way morning valve 14.
are alternately and continuously turned ON and OFF, liquid removal is always performed in the gas-liquid separation chamber I, and liquid drainage is performed intermittently in the liquid storage chamber 8.

As can be seen from the above description, this device is equipped with a gas-liquid mixed fluid inlet connected to a suction tip via a suction pipe, and an exhaust port connected to an ejector or a vacuum pump via an exhaust pipe. A gas-liquid separation chamber and a liquid storage chamber are provided in the tank via a partition wall, and a valve body operated by a pressure difference is provided at the discharge port formed in each of the partition wall and the bottom of the liquid removal tank. Since a three-way switching valve with a timer is installed on the connecting pipe connecting the liquid storage chamber, the entire structure is made smaller, and a single deliquid tank can be used for both dehydration and drainage. While the fluid removal action is performed, the fluid drainage action can also be performed repeatedly intermittently.

Therefore, even if the present device is installed in a medical treatment room, the installation area and installation space are greatly reduced, and the excellent effect is that the medical treatment space can be secured accordingly.

Furthermore, the device according to the present invention has an extremely simple structure, and is convenient in that the draining time can be determined in any way by simply setting the time on the timer.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing one embodiment of this invention;
The figure is a schematic sectional view showing another embodiment of this invention, and FIG. 3 is a plan view thereof. 1... Deliquor tank, 5... Partition wall, 1...
... Gas-liquid separation chamber, 8... Liquid storage chamber, 9, 10.
... Valve body, 13 ... Connection pipe, 14 ...
...Three-way switching valve, 15...Timer.

Claims (1)

[Scope of utility model registration request] A gas-liquid separation chamber is installed through a partition wall in the deliquification tank, which is equipped with an inlet for a gas-liquid mixed fluid that is connected to the suction tip via a suction pipe, and an exhaust port that is connected to an ejector or a vacuum pump via an exhaust pipe. A valve body operated by a pressure difference is provided at the discharge port formed in each of the partition wall and the bottom of the liquid removal tank, and a timer is installed in the connecting pipe connecting the gas-liquid separation chamber and the liquid storage chamber. A gas-liquid separator in a medical vacuum device equipped with a three-way switching valve.